plane,  a   missile actually    fired   or  a   plane   actually    took    off,    and
whenever    it  didn’t, one of  forty-two   separate    computer    models
simulated   each    of  those   actions so  precisely   that    the people  in
the war room    often   couldn’t    tell    it  wasn’t  real.   The game    lasted
for two and a   half    weeks.  For future  analysis,   a   team    of  JFCOM
specialists monitored   and recorded    every   conversation,   and a
computer    kept    track   of  every   bullet  fired   and missile launched
and tank    deployed.   This    was more    than    an  experiment. As
became  clear   less    than    a   year    later   —   when    the United  States
invaded a   Middle  Eastern state   with    a   rogue   commander   who
had a   strong  ethnic  power   base    and was thought to  be  harboring
terrorists  —   this    was a   full    dress   rehearsal   for war.
The stated  purpose of  Millennium  Challenge   was for the
Pentagon    to  test    a   set of  new and quite   radical ideas   about   how
to  go  to  battle. In  Operation   Desert  Storm   in  1991,   the United
States  had routed  the forces  of  Saddam  Hussein in  Kuwait. But
that    was an  utterly conventional    kind    of  war:    two heavily
armed   and organized   forces  meeting and fighting    in  an  open
battlefield.    In  the wake    of  Desert  Storm,  the Pentagon    became
convinced   that    that    kind    of  warfare would   soon    be  an
anachronism:    no  one would   be  foolish enough  to  challenge   the
United  States  head-to-head    in  pure    military    combat. Conflict    in
